TM 5-4520-253-13
2-5. OPERATION IN FAN MODE
a. Place HEATER-OFF-FAN switch (1) in FAN position.
b. Ventilating motor will start and white light will come on.
There is no thermostat control in fan mode. If
heater is still warm from heater operation, warm air will circulate until heat exchanger cools. Otherwise,
room temperature will be recirculated.
2 - 6 . S H U T D O W N
a. Place HEATER-OFF-FAN switch in OFF position.
Do not disconnect power cable from POWER RECEPTACLE
until heater has completed purge cycle.
b. For several minutes after operation in heater mode, ventilating motor will continue to run. After heater has
cooled, heater will shut off automatically.
2-7. OPERATION OF AUXILIARY EQUIPMENT
There are no special instructions for operation of auxiliary equipment. External fuel pump operates in response to
heater controls. Thermostat needs only to be set at desired temperature.
Change 2
2-5
